EP 0841658 B1 20010117 - Optical disc, optical disc recording reproducing apparatus and production method of the optical disc
Title (en)
Optical disc, optical disc recording reproducing apparatus and production method of the optical disc
Title (de)
Optische Platte, Gerät zur Aufnahme und Wiedergabe einer optischen Platte und Herstellungsverfahren der optischen Platte
Title (fr)
Disque optique, appareil d'enregistrement et de reproduction de disque et méthode de production du disque
Publication
Application
Priority
JP 31698396 A 19961112
Abstract (en)
[origin: EP0841658A2] A read only memory (ROM) disc 10 has an annular ROM area 12 in an outer area thereof, and a random access memory (RAM) disc 20 has an annular RAM area 22 in an inner area thereof. The ROM disc and the RAM disc are manufactured independently each other under respective preferable conditions. An optical disc 30 is provided by adhering the ROM disc and the RAM disc each other. An optical pickup 32 reproduces the optical disc or records thereon by irradiating a light from one side thereof. <IMAGE>
IPC 1-7
IPC 8 full level
G11B 7/00 (2006.01); G11B 7/007 (2006.01); G11B 7/24 (2006.01); G11B 7/26 (2006.01); G11B 7/30 (2006.01); G11B 7/0037 (2006.01)
CPC (source: EP KR US)
G11B 7/0079 (2013.01 - EP US); G11B 7/24 (2013.01 - EP US); G11B 7/24018 (2013.01 - KR); G11B 7/26 (2013.01 - EP US); G11B 7/0037 (2013.01 - EP US); G11B 7/261 (2013.01 - EP US); G11B 7/263 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0841658 A2 19980513; EP 0841658 A3 19981028; EP 0841658 B1 20010117; CN 1096666 C 20021218; CN 1194435 A 19980930; DE 69703924 D1 20010222; DE 69703924 T2 20010809; JP 3201289 B2 20010820; JP H10143920 A 19980529; KR 100258671 B1 20000615; KR 19980042323 A 19980817; US 6031808 A 20000229
DOCDB simple family (application)
EP 97119799 A 19971112; CN 97129733 A 19971112; DE 69703924 T 19971112; JP 31698396 A 19961112; KR 19970059451 A 19971112; US 96814197 A 19971112